P

Plain

SaaS platform unifying multi-channel customer support

Overview

Plain unifies B2B customer support across Slack, Teams, Discord, email, and chat into a single inbox via an API-first SaaS platform. It enables collaboration among support, engineering, and customer success, with AI workflows that automate tasks, draft responses, and pull product insights from conversations; core features include issue tracking, a themeable chat UI, and a configurable data model for early access, bug reports, and feedback. Unlike traditional ticketing systems, Plain emphasizes cross-team collaboration and API extensibility with pricing based on active customers rather than agent seats. The company aims to help growing B2B teams scale support operations, expand platform capabilities, and establish a U.S. presence in San Francisco.

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About Plain

Simplify's Rating
Why Plain is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & AnalyticsEnterprise SoftwareAI & Machine Learning

Company Size

51-200

Company Stage

Series A

Total Funding

$22M

Headquarters

London, United Kingdom

Founded

2020

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What believers are saying

  • Plain says 1,500-plus workflows run in production across its customer base.
  • Vercel cut support volume 65% after connecting AI agents to Plain in 2026.
  • Battery, Index, and Connect backed Plain's $15 million Series A in February 2025.

What critics are saying

  • Plain's own comparison names Salesforce Service Cloud, Intercom, Front, and Freshdesk as alternatives.
  • PlainLayoffs tracks 9,006 WARN notices through September 2026, signaling buyer cost pressure.
  • If buyers standardize on Intercom or Salesforce AI, Plain becomes a feature, not a company.

What makes Plain unique

  • Plain unifies Slack, Teams, Discord, email, and chat inside one B2B support inbox.
  • Its API-first model lets support, engineering, and customer success share live thread data.
  • Nov. 2026 releases add workflows, MCP, OAuth apps, and customer-agent handoffs.

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Funding

Total Funding

$21.9M

Above

Industry Average

Funded Over

2 Rounds

Series A funding typically happens when a startup has a product and some customers, and now needs funding to scale. This money is usually used to grow the team, expand marketing, and improve the product. Venture capital firms are frequently the main investors here.
Series A Funding Comparison
Meet Average

Industry standards

$15M
$8.2M
$15M
$15.9M
$30M

Benefits

  • Hybrid Work Options

Growth & Insights and Company News

6 month growth

1%

1 year growth

3%

2 year growth

-1%
Modem
Oct 6th, 2026
Modem now connects to Plain.

Modem now connects to Plain. Mike Clarke The Plain integration is now available for all Modem users. Connect it from Settings | Integrations | Plain. Supporting customers used to mean managing a separate tool for every channel. With Plain's unified dashboard and API, companies can handle all their support channels in one place and build their own workflows on top. With its new Plain integration, Modem adds these customer interactions to your growing customer context graph, connecting feedback across support and the rest of the software you use to run your business. Plain threads become product context. Once Plain is connected, Modem subscribes to realtime updates, so customer emails, chat messages, and internal notes typically show up within a few minutes. Modem also carry over each thread's status, priority, labels, and assignee, then group the thread with information from the other tools you've connected to Modem, like Linear and GitHub. Here's a topic built from two Plain threads about webhook deliveries being dropped by customer firewalls, plus the Linear ticket support filed for both. Quoted reply chains and signatures are stripped, so a topic reads like a conversation. Ask about support, get the engineering answer. Modem grouped both Plain threads under the problem they describe, so one question covers every customer who reported it. In the example above, the topic is In progress and Linear issue ENG-2210 is Open. Support can see that engineering is tracking the request, but it isn't ready to announce a fix. Once you've confirmed the fix is available, ask the agent to update every thread in the topic, including ones support already marked done. You can then ask it to send the customer-facing follow-up. The agent can also change a thread's status, priority, labels, or assignee. By default, writes ask for your approval before they run. The Plain API key's permissions decide which actions the agent can take. Leave the write permissions off the key to keep the agent read-only in Plain. Setup. You'll need an owner or admin role in Modem and the ability to create machine users in Plain. * In Plain, go to Settings | Machine users / API keys and create a key with read access to threads, messages, and customers, plus user:read, webhookTarget:create, webhookTarget:delete, and workspaceHmac:read. To use the examples above, also grant note:create for internal notes and thread:reply for customer replies. See the full permissions table. * In Modem, go to Settings | Integrations | Plain, paste the key, and click Connect Plain. Modem validates the key, registers its webhook, and starts capturing new activity. The optional backfill on the same page imports up to 500 threads created in the last 30 days.

Modem
Oct 6th, 2026
Modem now connects to Plain.

Modem now connects to Plain. Mike Clarke The Plain integration is now available for all Modem users. Connect it from Settings | Integrations | Plain. Supporting customers used to mean managing a separate tool for every channel. With Plain's unified dashboard and API, companies can handle all their support channels in one place and build their own workflows on top. With its new Plain integration, Modem adds these customer interactions to your growing customer context graph, connecting feedback across support and the rest of the software you use to run your business. Plain threads become product context. Once Plain is connected, Modem subscribes to realtime updates, so customer emails, chat messages, and internal notes typically show up within a few minutes. Modem also carry over each thread's status, priority, labels, and assignee, then group the thread with information from the other tools you've connected to Modem, like Linear and GitHub. Here's a topic built from two Plain threads about webhook deliveries being dropped by customer firewalls, plus the Linear ticket support filed for both. Quoted reply chains and signatures are stripped, so a topic reads like a conversation. Ask about support, get the engineering answer. Modem grouped both Plain threads under the problem they describe, so one question covers every customer who reported it. In the example above, the topic is In progress and Linear issue ENG-2210 is Open. Support can see that engineering is tracking the request, but it isn't ready to announce a fix. Once you've confirmed the fix is available, ask the agent to update every thread in the topic, including ones support already marked done. You can then ask it to send the customer-facing follow-up. The agent can also change a thread's status, priority, labels, or assignee. By default, writes ask for your approval before they run. The Plain API key's permissions decide which actions the agent can take. Leave the write permissions off the key to keep the agent read-only in Plain. Setup. You'll need an owner or admin role in Modem and the ability to create machine users in Plain. * In Plain, go to Settings | Machine users / API keys and create a key with read access to threads, messages, and customers, plus user:read, webhookTarget:create, webhookTarget:delete, and workspaceHmac:read. To use the examples above, also grant note:create for internal notes and thread:reply for customer replies. See the full permissions table. * In Modem, go to Settings | Integrations | Plain, paste the key, and click Connect Plain. Modem validates the key, registers its webhook, and starts capturing new activity. The optional backfill on the same page imports up to 500 threads created in the last 30 days.

Startbase
Feb 14th, 2025
Startupnews KW 7 - 25

Plain is developing a support platform for B2B companies that enables seamless, AI-powered customer communication via real-time channels such as Slack, Microsoft Teams and Discord.

EU-Startups
Feb 10th, 2025
Plain raises €14.5 million to develop their collaborative B2B support platform | EU-Startups

London-based Plain, a platform innovating B2B customer support, today announced it has raised €14.5 million in Series A funding to develop their

Department of Product
Nov 2nd, 2023
Product Briefing - November 16, 2023

To prove that, Plain integrates with other product favorites like Linear and Slack and some of its most powerful features include the ability to embed bug report forms directly into your product along with a feature that integrates real customer data into specific support issues.

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